<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>Document</title>
 </head>
 <body>
   <select id="sel">
       <option>1111</option>
	   <option>2222</option>
	   <option>3333</option>
   </select>
    <div style="height:1000px"></div>
   <a id="a">1212</a>
   <a href="javascript:void(0);">333333</a>
   <button id="btn">确定</button>
 </body>
     
	 <script>
	 
	      var sel = document.getElementById("sel");
		  var btn = document.getElementById("btn");
		  btn.addEventListener("click",ssss);
          function ssss(){
		      alert(sel.value);
		  }	 
	 
	 </script>
</html>
